Convert OBJ to STL Online — Free
Upload a Wavefront OBJ file and download it as Stereolithography. Runs entirely in your browser — no server uploads.
About These Formats
Wavefront OBJ
OBJ is a simple, human-readable text format that stores 3D geometry (vertices, faces, texture coordinates, and normals). It is one of the most universally supported formats.
Used with
Blender, Maya, Cinema 4D, 3ds Max, ZBrush, and virtually any 3D application.
Stereolithography
STL stores only triangulated geometry — no colors, textures, or animations. It is the de-facto standard for 3D printing slicers and CAD software.
Used with
3D printing slicers (Cura, PrusaSlicer, Bambu Studio), CAD tools, rapid prototyping workflows.
When to Convert OBJ to STL
Convert OBJ to STL when you need to 3D print the model. STL is the universal format for slicing software like Cura, PrusaSlicer, and Bambu Studio. Note that STL contains geometry only — colors and textures from the OBJ source will not be included.
Other OBJ Conversions
Frequently Asked Questions
How do I convert OBJ to STL?
Upload your .obj file using the tool above, confirm the source format is set to OBJ and the target is STL, then click Convert. The file processes in your browser and you can download it immediately.
Does converting OBJ to STL preserve textures?
STL stores geometry only. Textures and materials will not be included in the output.
Is this converter free?
Yes, completely free. No account, no usage limits, no hidden fees.
Are my files uploaded to a server?
No. All processing happens locally in your browser using WebGL. Your files never leave your device.